The grants, visits and interviews with professionals in the field of public health focus on prevention of disease. The diary includes updates on International Health Board projects, malaria control through quinine, discussions of effects of World War I and a conference between Dr. Heiser and Dr. Rose regarding South America.

Organized according to interview and visit, Hackett discusses projects and proposals with professionals in the field of public health. He is involved in the progress of the RF programs, development of new projects and financing current and future research. Hackett assess various tropical diseases in South America and the local response to these outbreaks. He surveys and tours various health facilities, laboratories and medical schools. Hackett continues to assist in the creation of local South American public health infrastructure. The diary details the IHD projects in Mexico such as the Vera Cruz studies. The DDT programs for South America are outlined. Communicable Disease Programs are documented. Updates from staff member diaries are included as well as photographs. Hackett attended the Meeting of the Directing Council of the Pan-American Sanitary Organization in Buenos Aires, Sept. 24-Oct. 2, 1947, and the 16th National Congress of Hygiene in Brazil.